On average there were around 50,000 people working in the Twin Towers daily plus as many as 200,000 visitors. Since the attacks IOTL took place early in the morning there were only around 18,000 people inside the Towers.
What if the attacks had taken place several hours later leading to a death toll an order of magnitude larger (over 50,000 deaths instead of 2,800)?
Would this have an significant impact or change the events that occurred afterwards?